server/process.c

   1 /*
   2  * Server-side process management
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8
   9 #include <assert.h>
  10 #include <errno.h>
  11 #include <limits.h>
  12 #include <signal.h>
  13 #include <string.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <sys/time.h>
  17 #ifdef HAVE_SYS_SOCKET_H
  18 # include <sys/socket.h>
  19 #endif
  20 #include <unistd.h>
  21
  22 #include "winbase.h"
  23 #include "winnt.h"
  24
  25 #include "handle.h"
  26 #include "process.h"
  27 #include "thread.h"
  28 #include "request.h"
  29
  30 /* process structure */
  31
  32 static struct process *first_process;
  33 static int running_processes;
  34
  35 /* process operations */
  36
  37 static void process_dump( struct object *obj, int verbose );
  38 static int process_signaled( struct object *obj, struct thread *thread );
  39 static void process_destroy( struct object *obj );
  40
  41 static const struct object_ops process_ops =
  42 {
  43     sizeof(struct process),      /* size */
  44     process_dump,                /* dump */
  45     add_queue,                   /* add_queue */
  46     remove_queue,                /* remove_queue */
  47     process_signaled,            /* signaled */
  48     no_satisfied,                /* satisfied */
  49     NULL,                        /* get_poll_events */
  50     NULL,                        /* poll_event */
  51     no_read_fd,                  /* get_read_fd */
  52     no_write_fd,                 /* get_write_fd */
  53     no_flush,                    /* flush */
  54     no_get_file_info,            /* get_file_info */
  55     process_destroy              /* destroy */
  56 };
  57
  58 /* set the process creation info */
  59 static int set_creation_info( struct process *process, struct new_process_request *req,
  60                               const char *cmd_line, size_t len )
  61 {
  62     if (!(process->info = mem_alloc( sizeof(*process->info) + len ))) return 0;
  63     if (req)
  64     {
  65         /* copy the request structure */
  66         memcpy( process->info, req, sizeof(*req) );
  67     }
  68     else  /* no request, use defaults */
  69     {
  70         req = process->info;
  71         req->pinherit     = 0;
  72         req->tinherit     = 0;
  73         req->inherit_all  = 0;
  74         req->create_flags = CREATE_NEW_CONSOLE;
  75         req->start_flags  = STARTF_USESTDHANDLES;
  76         req->exe_file     = -1;
  77         req->hstdin       = -1;
  78         req->hstdout      = -1;
  79         req->hstderr      = -1;
  80         req->event        = -1;
  81         req->cmd_show     = 0;
  82         req->env_ptr      = NULL;
  83     }
  84     memcpy( process->info->cmdline, cmd_line, len );
  85     process->info->cmdline[len] = 0;
  86     process->create_flags = process->info->create_flags;
  87     return 1;
  88 }
  89
  90 /* set the console and stdio handles for a newly created process */
  91 static int set_process_console( struct process *process, struct process *parent )
  92 {
  93     struct new_process_request *info = process->info;
  94
  95     if (process->create_flags & CREATE_NEW_CONSOLE)
  96     {
  97         if (!alloc_console( process )) return 0;
  98     }
  99     else if (!(process->create_flags & DETACHED_PROCESS))
 100     {
 101         if (parent->console_in) process->console_in = grab_object( parent->console_in );
 102         if (parent->console_out) process->console_out = grab_object( parent->console_out );
 103     }
 104     if (parent)
 105     {
 106         if (!info->inherit_all && !(info->start_flags & STARTF_USESTDHANDLES))
 107         {
 108             /* duplicate the handle from the parent into this process */
 109             info->hstdin  = duplicate_handle( parent, info->hstdin, process,
 110                                               0, TRUE, DUPLICATE_SAME_ACCESS );
 111             info->hstdout = duplicate_handle( parent, info->hstdout, process,
 112                                               0, TRUE, DUPLICATE_SAME_ACCESS );
 113             info->hstderr = duplicate_handle( parent, info->hstderr, process,
 114                                               0, TRUE, DUPLICATE_SAME_ACCESS );
 115         }
 116     }
 117     else
 118     {
 119         /* no parent, use handles to the console for stdio */
 120         info->hstdin  = alloc_handle( process, process->console_in,
 121                                       GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
 122         info->hstdout = alloc_handle( process, process->console_out,
 123                                       GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
 124         info->hstderr = alloc_handle( process, process->console_out,
 125                                       GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
 126     }
 127     return 1;
 128 }
 129
 130 /* create a new process and its main thread */
 131 struct thread *create_process( int fd, struct process *parent,
 132                                struct new_process_request *req,
 133                                const char *cmd_line, size_t len )
 134 {
 135     struct process *process;
 136     struct thread *thread = NULL;
 137
 138     if (!(process = alloc_object( &process_ops, -1 )))
 139     {
 140         close( fd );
 141         return NULL;
 142     }
 143     process->next            = NULL;
 144     process->prev            = NULL;
 145     process->thread_list     = NULL;
 146     process->debugger        = NULL;
 147     process->handles         = NULL;
 148     process->exit_code       = STILL_ACTIVE;
 149     process->running_threads = 0;
 150     process->priority        = NORMAL_PRIORITY_CLASS;
 151     process->affinity        = 1;
 152     process->suspend         = 0;
 153     process->create_flags    = 0;
 154     process->console_in      = NULL;
 155     process->console_out     = NULL;
 156     process->init_event      = NULL;
 157     process->info            = NULL;
 158     process->ldt_copy        = NULL;
 159     process->ldt_flags       = NULL;
 160     process->exe.next        = NULL;
 161     process->exe.prev        = NULL;
 162     process->exe.file        = NULL;
 163     process->exe.dbg_offset  = 0;
 164     process->exe.dbg_size    = 0;
 165     gettimeofday( &process->start_time, NULL );
 166     if ((process->next = first_process) != NULL) process->next->prev = process;
 167     first_process = process;
 168
 169     /* copy the request structure */
 170     if (!set_creation_info( process, req, cmd_line, len )) goto error;
 171
 172     if (process->info->inherit_all)
 173         process->handles = copy_handle_table( process, parent );
 174     else
 175         process->handles = alloc_handle_table( process, 0 );
 176     if (!process->handles) goto error;
 177
 178     /* alloc a handle for the process itself */
 179     alloc_handle( process, process, PROCESS_ALL_ACCESS, 0 );
 180
 181     /* retrieve the main exe file */
 182     if (process->info->exe_file != -1)
 183     {
 184         if (!(process->exe.file = get_file_obj( parent, process->info->exe_file,
 185                                                 GENERIC_READ ))) goto error;
 186         process->info->exe_file = -1;
 187     }
 188
 189     /* get the init done event */
 190     if (process->info->event != -1)
 191     {
 192         if (!(process->init_event = get_event_obj( parent, process->info->event,
 193                                                    EVENT_MODIFY_STATE ))) goto error;
 194     }
 195
 196     /* set the process console */
 197     if (!set_process_console( process, parent )) goto error;
 198
 199     /* create the main thread */
 200     if (!(thread = create_thread( fd, process, (process->create_flags & CREATE_SUSPENDED) != 0)))
 201         goto error;
 202
 203     /* attach to the debugger if requested */
 204     if (process->create_flags & (DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS))
 205         set_process_debugger( process, current );
 206     else if (parent && parent->debugger && !(parent->create_flags & DEBUG_ONLY_THIS_PROCESS))
 207         set_process_debugger( process, parent->debugger );
 208
 209     release_object( process );
 210     return thread;
 211
 212  error:
 213     close( fd );
 214     free_console( process );
 215     if (process->handles) release_object( process->handles );
 216     release_object( process );
 217     return NULL;
 218 }
 219
 220 /* destroy a process when its refcount is 0 */
 221 static void process_destroy( struct object *obj )
 222 {
 223     struct process *process = (struct process *)obj;
 224     assert( obj->ops == &process_ops );
 225
 226     /* we can't have a thread remaining */
 227     assert( !process->thread_list );
 228     if (process->next) process->next->prev = process->prev;
 229     if (process->prev) process->prev->next = process->next;
 230     else first_process = process->next;
 231     if (process->info) free( process->info );
 232     if (process->init_event) release_object( process->init_event );
 233     if (process->exe.file) release_object( process->exe.file );
 234 }
 235
 236 /* dump a process on stdout for debugging purposes */
 237 static void process_dump( struct object *obj, int verbose )
 238 {
 239     struct process *process = (struct process *)obj;
 240     assert( obj->ops == &process_ops );
 241
 242     fprintf( stderr, "Process next=%p prev=%p console=%p/%p handles=%p\n",
 243              process->next, process->prev, process->console_in, process->console_out,
 244              process->handles );
 245 }
 246
 247 static int process_signaled( struct object *obj, struct thread *thread )
 248 {
 249     struct process *process = (struct process *)obj;
 250     return !process->running_threads;
 251 }
 252
 253
 254 /* get a process from an id (and increment the refcount) */
 255 struct process *get_process_from_id( void *id )
 256 {
 257     struct process *p = first_process;
 258     while (p && (p != id)) p = p->next;
 259     if (p) grab_object( p );
 260     else set_error( STATUS_INVALID_PARAMETER );
 261     return p;
 262 }
 263
 264 /* get a process from a handle (and increment the refcount) */
 265 struct process *get_process_from_handle( int handle, unsigned int access )
 266 {
 267     return (struct process *)get_handle_obj( current->process, handle,
 268                                              access, &process_ops );
 269 }
 270
 271 /* add a dll to a process list */
 272 static struct process_dll *process_load_dll( struct process *process, struct file *file,
 273                                              void *base )
 274 {
 275     struct process_dll *dll;
 276
 277     /* make sure we don't already have one with the same base address */
 278     for (dll = process->exe.next; dll; dll = dll->next) if (dll->base == base)
 279     {
 280         set_error( STATUS_INVALID_PARAMETER );
 281         return NULL;
 282     }
 283
 284     if ((dll = mem_alloc( sizeof(*dll) )))
 285     {
 286         dll->prev = &process->exe;
 287         dll->file = NULL;
 288         dll->base = base;
 289         if (file) dll->file = (struct file *)grab_object( file );
 290         if ((dll->next = process->exe.next)) dll->next->prev = dll;
 291         process->exe.next = dll;
 292     }
 293     return dll;
 294 }
 295
 296 /* remove a dll from a process list */
 297 static void process_unload_dll( struct process *process, void *base )
 298 {
 299     struct process_dll *dll;
 300
 301     for (dll = process->exe.next; dll; dll = dll->next)
 302     {
 303         if (dll->base == base)
 304         {
 305             if (dll->file) release_object( dll->file );
 306             if (dll->next) dll->next->prev = dll->prev;
 307             if (dll->prev) dll->prev->next = dll->next;
 308             free( dll );
 309             generate_debug_event( current, UNLOAD_DLL_DEBUG_EVENT, base );
 310             return;
 311         }
 312     }
 313     set_error( STATUS_INVALID_PARAMETER );
 314 }
 315
 316 /* a process has been killed (i.e. its last thread died) */
 317 static void process_killed( struct process *process )
 318 {
 319     assert( !process->thread_list );
 320     gettimeofday( &process->end_time, NULL );
 321     release_object( process->handles );
 322     process->handles = NULL;
 323     free_console( process );
 324     while (process->exe.next)
 325     {
 326         struct process_dll *dll = process->exe.next;
 327         process->exe.next = dll->next;
 328         if (dll->file) release_object( dll->file );
 329         free( dll );
 330     }
 331     if (process->exe.file) release_object( process->exe.file );
 332     process->exe.file = NULL;
 333     wake_up( &process->obj, 0 );
 334     if (!--running_processes)
 335     {
 336         /* last process died, close global handles */
 337         close_global_handles();
 338         /* this will cause the select loop to terminate */
 339         if (!persistent_server) close_master_socket();
 340     }
 341 }
 342
 343 /* add a thread to a process running threads list */
 344 void add_process_thread( struct process *process, struct thread *thread )
 345 {
 346     thread->proc_next = process->thread_list;
 347     thread->proc_prev = NULL;
 348     if (thread->proc_next) thread->proc_next->proc_prev = thread;
 349     process->thread_list = thread;
 350     if (!process->running_threads++) running_processes++;
 351     grab_object( thread );
 352 }
 353
 354 /* remove a thread from a process running threads list */
 355 void remove_process_thread( struct process *process, struct thread *thread )
 356 {
 357     assert( process->running_threads > 0 );
 358     assert( process->thread_list );
 359
 360     if (thread->proc_next) thread->proc_next->proc_prev = thread->proc_prev;
 361     if (thread->proc_prev) thread->proc_prev->proc_next = thread->proc_next;
 362     else process->thread_list = thread->proc_next;
 363
 364     if (!--process->running_threads)
 365     {
 366         /* we have removed the last running thread, exit the process */
 367         process->exit_code = thread->exit_code;
 368         generate_debug_event( thread, EXIT_PROCESS_DEBUG_EVENT, process );
 369         process_killed( process );
 370     }
 371     else generate_debug_event( thread, EXIT_THREAD_DEBUG_EVENT, thread );
 372     release_object( thread );
 373 }
 374
 375 /* suspend all the threads of a process */
 376 void suspend_process( struct process *process )
 377 {
 378     if (!process->suspend++)
 379     {
 380         struct thread *thread = process->thread_list;
 381         for (; thread; thread = thread->proc_next)
 382         {
 383             if (!thread->suspend) stop_thread( thread );
 384         }
 385     }
 386 }
 387
 388 /* resume all the threads of a process */
 389 void resume_process( struct process *process )
 390 {
 391     assert (process->suspend > 0);
 392     if (!--process->suspend)
 393     {
 394         struct thread *thread = process->thread_list;
 395         for (; thread; thread = thread->proc_next)
 396         {
 397             if (!thread->suspend) continue_thread( thread );
 398         }
 399     }
 400 }
 401
 402 /* kill a process on the spot */
 403 static void kill_process( struct process *process, struct thread *skip, int exit_code )
 404 {
 405     struct thread *thread = process->thread_list;
 406     while (thread)
 407     {
 408         struct thread *next = thread->proc_next;
 409         thread->exit_code = exit_code;
 410         if (thread != skip) kill_thread( thread, 1 );
 411         thread = next;
 412     }
 413 }
 414
 415 /* kill all processes being debugged by a given thread */
 416 void kill_debugged_processes( struct thread *debugger, int exit_code )
 417 {
 418     for (;;)  /* restart from the beginning of the list every time */
 419     {
 420         struct process *process = first_process;
 421         /* find the first process being debugged by 'debugger' and still running */
 422         while (process && (process->debugger != debugger || !process->running_threads))
 423             process = process->next;
 424         if (!process) return;
 425         process->debugger = NULL;
 426         kill_process( process, NULL, exit_code );
 427     }
 428 }
 429
 430 /* get all information about a process */
 431 static void get_process_info( struct process *process, struct get_process_info_request *req )
 432 {
 433     req->pid              = process;
 434     req->debugged         = (process->debugger != 0);
 435     req->exit_code        = process->exit_code;
 436     req->priority         = process->priority;
 437     req->process_affinity = process->affinity;
 438     req->system_affinity  = 1;
 439 }
 440
 441 /* set all information about a process */
 442 static void set_process_info( struct process *process,
 443                               struct set_process_info_request *req )
 444 {
 445     if (req->mask & SET_PROCESS_INFO_PRIORITY)
 446         process->priority = req->priority;
 447     if (req->mask & SET_PROCESS_INFO_AFFINITY)
 448     {
 449         if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
 450         else process->affinity = req->affinity;
 451     }
 452 }
 453
 454 /* read data from a process memory space */
 455 /* len is the total size (in ints), max is the size we can actually store in the output buffer */
 456 /* we read the total size in all cases to check for permissions */
 457 static void read_process_memory( struct process *process, const int *addr,
 458                                  size_t len, size_t max, int *dest )
 459 {
 460     struct thread *thread = process->thread_list;
 461
 462     if ((unsigned int)addr % sizeof(int))  /* address must be aligned */
 463     {
 464         set_error( STATUS_INVALID_PARAMETER );
 465         return;
 466     }
 467     if (!thread)  /* process is dead */
 468     {
 469         set_error( STATUS_ACCESS_DENIED );
 470         return;
 471     }
 472     if (suspend_for_ptrace( thread ))
 473     {
 474         while (len > 0 && max)
 475         {
 476             if (read_thread_int( thread, addr++, dest++ ) == -1) goto done;
 477             max--;
 478             len--;
 479         }
 480         /* check the rest for read permission */
 481         if (len > 0)
 482         {
 483             int dummy, page = get_page_size() / sizeof(int);
 484             while (len >= page)
 485             {
 486                 addr += page;
 487                 len -= page;
 488                 if (read_thread_int( thread, addr - 1, &dummy ) == -1) goto done;
 489             }
 490             if (len && (read_thread_int( thread, addr + len - 1, &dummy ) == -1)) goto done;
 491         }
 492     done:
 493         resume_thread( thread );
 494     }
 495 }
 496
 497 /* write data to a process memory space */
 498 /* len is the total size (in ints), max is the size we can actually read from the input buffer */
 499 /* we check the total size for write permissions */
 500 static void write_process_memory( struct process *process, int *addr, size_t len,
 501                                   size_t max, unsigned int first_mask,
 502                                   unsigned int last_mask, const int *src )
 503 {
 504     struct thread *thread = process->thread_list;
 505
 506     if (!len || ((unsigned int)addr % sizeof(int)))  /* address must be aligned */
 507     {
 508         set_error( STATUS_INVALID_PARAMETER );
 509         return;
 510     }
 511     if (!thread)  /* process is dead */
 512     {
 513         set_error( STATUS_ACCESS_DENIED );
 514         return;
 515     }
 516     if (suspend_for_ptrace( thread ))
 517     {
 518         /* first word is special */
 519         if (len > 1)
 520         {
 521             if (write_thread_int( thread, addr++, *src++, first_mask ) == -1) goto done;
 522             len--;
 523             max--;
 524         }
 525         else last_mask &= first_mask;
 526
 527         while (len > 1 && max)
 528         {
 529             if (write_thread_int( thread, addr++, *src++, ~0 ) == -1) goto done;
 530             max--;
 531             len--;
 532         }
 533
 534         if (max)
 535         {
 536             /* last word is special too */
 537             if (write_thread_int( thread, addr, *src, last_mask ) == -1) goto done;
 538         }
 539         else
 540         {
 541             /* check the rest for write permission */
 542             int page = get_page_size() / sizeof(int);
 543             while (len >= page)
 544             {
 545                 addr += page;
 546                 len -= page;
 547                 if (write_thread_int( thread, addr - 1, 0, 0 ) == -1) goto done;
 548             }
 549             if (len && (write_thread_int( thread, addr + len - 1, 0, 0 ) == -1)) goto done;
 550         }
 551     done:
 552         resume_thread( thread );
 553     }
 554 }
 555
 556 /* take a snapshot of currently running processes */
 557 struct process_snapshot *process_snap( int *count )
 558 {
 559     struct process_snapshot *snapshot, *ptr;
 560     struct process *process;
 561     if (!running_processes) return NULL;
 562     if (!(snapshot = mem_alloc( sizeof(*snapshot) * running_processes )))
 563         return NULL;
 564     ptr = snapshot;
 565     for (process = first_process; process; process = process->next)
 566     {
 567         if (!process->running_threads) continue;
 568         ptr->process  = process;
 569         ptr->threads  = process->running_threads;
 570         ptr->priority = process->priority;
 571         grab_object( process );
 572         ptr++;
 573     }
 574     *count = running_processes;
 575     return snapshot;
 576 }
 577
 578 /* create a new process */
 579 DECL_HANDLER(new_process)
 580 {
 581     size_t len = get_req_strlen( req, req->cmdline );
 582     struct thread *thread;
 583     int sock[2];
 584
 585     req->phandle = -1;
 586     req->thandle = -1;
 587     req->pid     = NULL;
 588     req->tid     = NULL;
 589
 590     if (socketpair( AF_UNIX, SOCK_STREAM, 0, sock ) == -1)
 591     {
 592         file_set_error();
 593         return;
 594     }
 595
 596     if ((thread = create_process( sock[0], current->process, req, req->cmdline, len )))
 597     {
 598         int phandle = alloc_handle( current->process, thread->process,
 599                                     PROCESS_ALL_ACCESS, req->pinherit );
 600         if ((req->phandle = phandle) != -1)
 601         {
 602             if ((req->thandle = alloc_handle( current->process, thread,
 603                                               THREAD_ALL_ACCESS, req->tinherit )) != -1)
 604             {
 605                 /* thread object will be released when the thread gets killed */
 606                 set_reply_fd( current, sock[1] );
 607                 req->pid = thread->process;
 608                 req->tid = thread;
 609                 return;
 610             }
 611             close_handle( current->process, phandle );
 612         }
 613         release_object( thread );
 614     }
 615     close( sock[1] );
 616 }
 617
 618 /* initialize a new process */
 619 DECL_HANDLER(init_process)
 620 {
 621     struct new_process_request *info;
 622
 623     if (!current->unix_pid)
 624     {
 625         fatal_protocol_error( current, "init_process: init_thread not called yet\n" );
 626         return;
 627     }
 628     if (!(info = current->process->info))
 629     {
 630         fatal_protocol_error( current, "init_process: called twice\n" );
 631         return;
 632     }
 633     current->process->ldt_copy  = req->ldt_copy;
 634     current->process->ldt_flags = req->ldt_flags;
 635     current->process->info = NULL;
 636     req->exe_file    = -1;
 637     req->start_flags = info->start_flags;
 638     req->hstdin      = info->hstdin;
 639     req->hstdout     = info->hstdout;
 640     req->hstderr     = info->hstderr;
 641     req->cmd_show    = info->cmd_show;
 642     req->env_ptr     = info->env_ptr;
 643     strcpy( req->cmdline, info->cmdline );
 644     if (current->process->exe.file)
 645         req->exe_file = alloc_handle( current->process, current->process->exe.file,
 646                                       GENERIC_READ, 0 );
 647     free( info );
 648 }
 649
 650 /* signal the end of the process initialization */
 651 DECL_HANDLER(init_process_done)
 652 {
 653     struct process *process = current->process;
 654     if (!process->init_event)
 655     {
 656         fatal_protocol_error( current, "init_process_done: no event\n" );
 657         return;
 658     }
 659     process->exe.base = req->module;
 660     generate_startup_debug_events( current->process, req->entry );
 661     set_event( process->init_event );
 662     release_object( process->init_event );
 663     process->init_event = NULL;
 664     if (current->suspend + current->process->suspend > 0) stop_thread( current );
 665     req->debugged = (current->process->debugger != 0);
 666 }
 667
 668 /* open a handle to a process */
 669 DECL_HANDLER(open_process)
 670 {
 671     struct process *process = get_process_from_id( req->pid );
 672     req->handle = -1;
 673     if (process)
 674     {
 675         req->handle = alloc_handle( current->process, process, req->access, req->inherit );
 676         release_object( process );
 677     }
 678 }
 679
 680 /* terminate a process */
 681 DECL_HANDLER(terminate_process)
 682 {
 683     struct process *process;
 684
 685     if ((process = get_process_from_handle( req->handle, PROCESS_TERMINATE )))
 686     {
 687         req->self = (current->process == process);
 688         kill_process( process, current, req->exit_code );
 689         release_object( process );
 690     }
 691 }
 692
 693 /* fetch information about a process */
 694 DECL_HANDLER(get_process_info)
 695 {
 696     struct process *process;
 697
 698     if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
 699     {
 700         get_process_info( process, req );
 701         release_object( process );
 702     }
 703 }
 704
 705 /* set information about a process */
 706 DECL_HANDLER(set_process_info)
 707 {
 708     struct process *process;
 709
 710     if ((process = get_process_from_handle( req->handle, PROCESS_SET_INFORMATION )))
 711     {
 712         set_process_info( process, req );
 713         release_object( process );
 714     }
 715 }
 716
 717 /* read data from a process address space */
 718 DECL_HANDLER(read_process_memory)
 719 {
 720     struct process *process;
 721
 722     if ((process = get_process_from_handle( req->handle, PROCESS_VM_READ )))
 723     {
 724         read_process_memory( process, req->addr, req->len,
 725                              get_req_size( req, req->data, sizeof(int) ), req->data );
 726         release_object( process );
 727     }
 728 }
 729
 730 /* write data to a process address space */
 731 DECL_HANDLER(write_process_memory)
 732 {
 733     struct process *process;
 734
 735     if ((process = get_process_from_handle( req->handle, PROCESS_VM_WRITE )))
 736     {
 737         write_process_memory( process, req->addr, req->len,
 738                               get_req_size( req, req->data, sizeof(int) ),
 739                               req->first_mask, req->last_mask, req->data );
 740         release_object( process );
 741     }
 742 }
 743
 744 /* notify the server that a dll has been loaded */
 745 DECL_HANDLER(load_dll)
 746 {
 747     struct process_dll *dll;
 748     struct file *file = NULL;
 749
 750     if ((req->handle != -1) &&
 751         !(file = get_file_obj( current->process, req->handle, GENERIC_READ ))) return;
 752
 753     if ((dll = process_load_dll( current->process, file, req->base )))
 754     {
 755         dll->dbg_offset = req->dbg_offset;
 756         dll->dbg_size   = req->dbg_size;
 757         dll->name       = req->name;
 758         /* only generate event if initialization is done */
 759         if (!current->process->init_event)
 760             generate_debug_event( current, LOAD_DLL_DEBUG_EVENT, dll );
 761     }
 762     if (file) release_object( file );
 763 }
 764
 765 /* notify the server that a dll is being unloaded */
 766 DECL_HANDLER(unload_dll)
 767 {
 768     process_unload_dll( current->process, req->base );
 769 }